Find the sum: (х2 + 2x+3) + (3х2 +х+ 1)
оа. 3x4 + 4х + 3
ов. 4х2 + 3x+4
нам ана на
е
агаарын
ос. 4х3 + 3х + 4
оо
od. 4x4 + 4х + 3

option b

Step-by-step explanation:

(х2 + 2x+3) + (3х2 +х+ 1)

we sum the terms of equal variables

х2 + 3х2 +2x +х+ 1

4x2+3x+4

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.